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Current system
21441+2845
STF 2822 AD


Nearby doubles
21' : 21444+2824
KPP3373

28' : 21461+2855
BRT 58

29' : 21454+2819
J 3145

33' : 21452+2914
UC 4550

35' : 21418+2901
MLB 492

37' : 21462+2817
MLB 540AB

43' : 21416+2911
GRV 493

43' : 21469+2907
CVR 919

45' : 21474+2855
AG 420

45' : 21474+2834
A 300AB

48' : 21420+2924
MLB 539

51' : 21423+2800
GRV 494

54' : 21439+2751
HO 166

55' : 21410+2920
STT 448

57' : 21442+2942
MLB 493

58' : 21480+2819
MLB 541

60' : 21470+2930
GRV 503

64' : 21473+2932
STJ 58

65' : 21458+2945
DAM 236

67' : 21455+2948
DAM 237

68' : 21430+2951
KPP 498

70' : 21420+2741
RAO 465AB

71' : 21390+2826
ES 520

72' : 21401+2928
BRT 57

73' : 21458+2954
TDT3146

73' : 21420+2951
MLB 720



Selections
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Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

21441+2845 STF 2822 AD

 
 
21h 44m 08.57s +28° 44' 33.4" P.A. 43.00 sep 197.0 mag 4.75,6.94 Sp F6V+F2V dist. 22.24 pc (72.55 l.y.)
 
 
Coord 2000 21441+2845 Discov num STF2822 Comp AD Coord arcsec 2000 21 44 08.57 +28 44 33.4
Date first 1800 Date last 2019 Obs 56
Pa first 62 Pa last 43 P.A. Now (θ) 43°
Sep first 216.5 Sep last 197 Sep. Now (ρ) 197"
Mag pri 4.75 Mag sec 6.94 delta mag (ΔM) 2.19 Spectral class F6V+F2V (yellow-white/yellow-white)
Pri motion ra +260 Sec motion ra -001
Pri motion dec -243 Sec motion dec -054
Notes N L U (See Notes, Linear solution, Proper motion indicates non-physical)
rPM=0.905
This double is not physical.
 
 
21441+2845 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Mu1 Cyg 89940 21 44 09 +28 44 33 STF 2822 AB 2020 735 325 1.6 4.75 6.18 1.43 Y
Show 89940 21 44 09 +28 44 33 STF 2822 AC 2012 16 292 76.6 4.75 12.93 8.18
Show 89940 21 44 09 +28 44 33 STF 2822 AD 2019 56 43 197.0 4.75 6.94 2.19 <===
Show 89940 21 44 09 +28 44 33 FYM 25 AF 2012 3 72 111.5 4.75 12.64 7.89
Show 89940 21 44 09 +28 44 33 FYM 25 AG 2012 3 73 168.1 4.75 13.77 9.02
Show 89944 21 44 08 +28 44 35 STF 2822 BD 2012 24 45 196.7 6.18 6.94 0.76
Show 89944 21 44 19 +28 46 54 ES 521 DE 2015 7 286 17.5 6.94 13.13 6.19
Show 89944 21 44 19 +28 46 54 FYM 25 DG 2012 3 164 89.6 6.94 13.77 6.83
Septuple system
7 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus SAO 89940 HIP 107310 Tycho2 2201-02078-1
HD 206827 HR 8310 GC 30437 ADS 15270
GL Gl 836.6A BD BD+28 4169 Bayer Mu 1 Cygni Bayer name Mu1 Cyg
Flamsteed 78 Cygni Flamsteed name 78 Cyg Distance 22.24 Distance ly 72.55
Bayer greek μ1 Cyg
 
 
WDS 21441+2845 STF 2822 AD : NOTES
 
 
discov_num notes refcode
STF2822 mu Cyg. The A component is a double-lined spectroscopic binary.
AB: H III 15. D is the principal component of ES 521.
AC and AD: Optical pairs, based on study of relative motion of the
components using the method of apparent motion parameters. Kiy2008
AB: H 3 15. MEv2010
ES 521 DE: D is SB2 Tok2014d
FYM 25 DG pair initially listed incorrected as DH. FyM2014b
STF2822 AC: Rectilinear solution by Friedman et al. (2011). USN2011a
 
 
REFERENCES
 
 
refcode metd author reference
FyM2014b C - Fay, M. .
FyM2014b private communication
Kiy2008 - Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S. 2008SvAL...32..405K
Kiy2008 SvAL 34, 405, 2008
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Tok2014d E2 - Tokovinin, A. 2014AJ....147...86T
Tok2014d AJ 147, 86, 2014
USN2011a lin - Friedman, E.A., Mason, B.D., & Hartkopf, W.I. 2011IAUDS.175....1F
USN2011a Inf. Circ. 175, 1, 2011
 
 
DISCOVERER
 
 
idgroup discov author
1 ES Espin, T.E.
96 STF Struve, F.G.W.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21441+2845 STF2822 AD 2001 46 45 197.5 4.75 6.94 F6V F2V NL 214408.57+284433.4
21441+2845 STF2822 AD 2011 48 44 197.5 4.75 6.94 F6V F2V NL 214408.57+284433.4
21441+2845 STF2822 AD 2012 50 45 197.5 4.75 6.94 F6V F2V NL 214408.57+284433.4
21441+2845 STF2822 AD 2014 52 43 197.1 4.75 6.94 F6V F2V NL U 214408.57+284433.4
21441+2845 STF2822 AD 2019 56 43 197.0 4.75 6.94 F6V+F2V NL U 214408.57+284433.4

If you need more information about this double, apply for a data request form to the WDS.

 
 
WDS 21441+2845 STF 2822 AD : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21441+2845 STF 2822 AD : MEASURES
 
 
No records found.

 
 
WDS 21441+2845 : VIRTUAL EYEPIECE
 
 

21441+2845 STF2822A mag 4.75 Sp F6V 21441+2845 STF2822B sep 1.9 P.A. 309.70 mag 6.18 Sp G2V 21441+2845 STF2822C sep 68.5 P.A. 294.50 mag 12.93 21441+2845 ES 521D sep 197.8 P.A. 44.80 mag 6.94 Sp A5 21441+2845 ES 521E sep 191.3 P.A. 40.70 mag 13.13 21441+2845 FYM 25F sep 99.2 P.A. 69.40 mag 12.64 21441+2845 FYM 25G sep 149.4 P.A. 70.30 mag 13.77 virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 21441+2845 : ALADIN DSS IMAGE @ 21h 44m 08.57s +28° 44' 33.4"
 
 
 
 
WDS 21441+2845 STF 2822 AD : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21441+2845 STF2822AD distance=0' 21441+2845 STF2822BD distance=1' 21441+2845 ES 521DE distance=4' 21441+2845 FYM 25DG distance=4' 21444+2824 KPP3373 distance=21' 21461+2855 BRT 58 distance=28' 21454+2819 J 3145 distance=29' 21452+2914 UC 4550 distance=33' 21418+2901 MLB 492 distance=35' 21462+2817 MLB 540AB distance=37' 21462+2817 MLB 540AC distance=37' 21462+2817 ABH 152AD distance=37' 21462+2817 ABH 152AE distance=37' 21416+2911 GRV 493 distance=43' 21469+2907 CVR 919 distance=43' 21474+2855 AG 420 distance=45' 21474+2834 A 300AB distance=45' 21474+2834 A 300AC distance=45' 21474+2834 A 300AD distance=45' 21420+2924 MLB 539 distance=48' 21423+2800 GRV 494 distance=51' 21439+2751 HO 166 distance=54' 21410+2920 STT 448 distance=55' 21442+2942 MLB 493 distance=57' 21480+2819 MLB 541 distance=58' 21470+2930 GRV 503 distance=60' 21473+2932 STJ 58 distance=64' 21458+2945 DAM 236 distance=65' 21455+2948 DAM 237 distance=67' 21430+2951 KPP 498 distance=68' 21420+2741 RAO 465Aa,Ab distance=70' 21420+2741 RAO 465AB distance=70' 21390+2826 ES 520 distance=71' 21401+2928 BRT 57 distance=72' 21458+2954 TDT3146 distance=73' 21420+2951 MLB 720 distance=73' 21457+2957 TDT3145 distance=75' 21477+2740 CVR 922 distance=80' 21435+2725 BKO 631 distance=80' 21412+2955 GRV 491 distance=81' 21435+2721 OSO 155DG distance=82' 21435+2721 A 299DE distance=82' 21435+2721 A 299DF distance=82' 21453+2722 HO 606 distance=85' 21435+2721 A 299AB distance=85' 21435+2721 A 299AD distance=85' 21435+2721 A 299BC distance=85' 21399+2737 HDS3083 distance=88' 21422+3008 MLB 575BC distance=89' 21422+3008 MLB 575AC distance=89' 21429+3014 TDT3119 distance=92' grafico limitrofi
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Show name coord_2000 discov# comp pa sep dist(')
Show 21441+2845 STF2822 AB 325 1.6
Show 21441+2845 STF2822 AC 292 76.6
Show 21441+2845 STF2822 AD 43 197.0
Show 21441+2845 FYM 25 AF 72 111.5
Show 21441+2845 FYM 25 AG 73 168.1
Show 21441+2845 STF2822 BD 45 196.7 1
Show 21441+2845 ES 521 DE 286 17.5 4
Show 21441+2845 FYM 25 DG 164 89.6 4
Show 21444+2824 KPP3373 242 2.1 21
Show 21461+2855 BRT 58 165 4.4 28
Show 21454+2819 J 3145 112 5.4 29
Show 21452+2914 UC 4550 15 42.5 33
Show 21418+2901 MLB 492 114 7.0 35
Show 21462+2817 MLB 540 AB 256 4.1 37
Show 21462+2817 MLB 540 AC 322 8.7 37
Show 21462+2817 ABH 152 AD 68 41.8 37
Show 21462+2817 ABH 152 AE 96 80.1 37
Show 21416+2911 GRV 493 184 44.7 43
Show 21469+2907 CVR 919 201 23.5 43
Show 21474+2855 AG 420 145 7.5 45
Show 21474+2834 A 300 AB 252 2.3 45
Show 21474+2834 A 300 AC 29 7.5 45
Show 21474+2834 A 300 AD 170 8.4 45
Show 21420+2924 MLB 539 171 4.8 48
Show 21423+2800 GRV 494 323 62.9 51
Show 21439+2751 HO 166 233 0.2 54
Show 21410+2920 STT 448 31 0.1 55
Show 21442+2942 MLB 493 330 8.6 57
Show 21480+2819 MLB 541 340 9.9 58
Show 21470+2930 GRV 503 331 20.4 60
Show 21473+2932 STJ 58 193 1.8 64
Show 21458+2945 DAM 236 143 5.9 65
Show 21455+2948 DAM 237 233 6.3 67
Show 21430+2951 KPP 498 58 3.9 68
Show 21420+2741 RAO 465 Aa,Ab 128 0.3 70
Show 21420+2741 RAO 465 AB 303 2.6 70
Show 21390+2826 ES 520 36 9.3 71
Show 21401+2928 BRT 57 137 5.0 72
Show 21458+2954 TDT3146 359 2.5 73
Show 21420+2951 MLB 720 140 7.2 73
Show 21457+2957 TDT3145 250 2.2 75
Show 21477+2740 CVR 922 225 9.9 80
Show 21435+2725 BKO 631 26 5.9 80
Show 21412+2955 GRV 491 21 31.4 81
Show 21435+2721 OSO 155 DG 304 6.1 82
Show 21435+2721 A 299 DE 95 999.9 82
Show 21435+2721 A 299 DF 26 145.8 82
Show 21453+2722 HO 606 93 18.4 85
Show 21435+2721 A 299 AB 67 1.1 85
Show 21435+2721 A 299 AD 64 374.5 85
Show 21435+2721 A 299 BC 325 0.1 85

 
 
WDS 21441+2845 : COMPONENTS
 
 
  A B C D E F
B pa=309.7°
sep=1.88"
 
C pa=294.5°
sep=68.54"
pa=294.1°
sep=66.73"
 
D pa=44.8°
sep=197.77"
pa=45.4°
sep=197.94"
pa=61.0°
sep=230.66"
 
E pa=40.7°
sep=191.34"
pa=41.2°
sep=191.38"
pa=58.0°
sep=220.43"
pa=288.2°
sep=15.49"
 
F pa=69.4°
sep=99.16"
pa=70.4°
sep=100.11"
pa=87.6°
sep=155.33"
pa=203.8°
sep=115.30"
pa=196.1°
sep=114.83"
 
G pa=70.3°
sep=149.37"
pa=70.9°
sep=150.33"
pa=83.9°
sep=204.17"
pa=179.2°
sep=90.03"
pa=170.4°
sep=96.20"
pa=72.1°
sep=50.24"
 
 
21441+2845 A
 
 
Name Mu1 Cyg Coord arcsec 2000 214408.57+284433.4 Mag 4.75 Spectral class F6V (yellow-white)
PmRA 260.00 PmDE -243.0 SAO 89940 HIP 107310
Tycho2 2201-02078-1 HD 206826 HR 8309 GC 30438
BD BD+28 4169 Bayer Mu 1 Cygni Bayer name Mu1 Flamsteed 78 Cygni
Flamsteed name 78 Cyg
Tycho2
Tycho2 2201-02078-1 Pflag P RAmdeg 326.03572417 DEmdeg 28.74264837
PmRA 277.4 PmDE -251.1 E RAmdeg 3 E DEmdeg 3
E pmRA 2.7 E pmDE 2.6 EpRAm 1991.91 EpDEm 1992.01
Num 3 Q RAmdeg 1.0 Q DEmdeg 0.3 Q pmRA 1.0
Q pmDE 0.3 BTmag 5.223 E BTmag 0.014 VTmag 4.745
E VTmag 0.009 Prox 20 TYC T HIP 107310
CCDM A RAdeg 326.03507722 DEdeg 28.74316972 EpRA 1990 1.92
EpDE 1990 2.02 E RAdeg 3.1 E DEdeg 3.3 Posflg D
Corr 0.3
SAO
SAO 89940 DelFlag RA1950 PmRA1950 0.022
DE1950 PmDE1950 -0.238 Vmag 4.7 SpType F5
Double code Source 70 CatNum 30438 DM BD+28 4169
DMcomp A BDsup HD 206826 M HD 0
GC 30438 RA1950rad 5.68062827 DE1950rad 0.49770008 PmRA2000 0.0222
PmDE2000 -0.241
Hipparcos
Catalog H HIP 107310 Proxy H RAhms 21 44 08.40
DEdms +28 44 35.6 Vmag 4.49 VarFlag R Vmag H
RAdeg 326.035 DEdeg 28.7432 AstroRef A Plx 44.64
CCDM 21442+2845 N CCDM I Nsys 2 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 302 Rho 2.002 HD 206826 BD BD+28 4169
CD CP Dm number +28 4169 VIred 0.55
SpType F6V R SpType Coord arcsec 2000 214408.40+284435.6
Hipparcos 2
HIP 107310 Sn 15 So 3 Nc 2
RArad 5.6903845519 DErad 0.5016638713 Plx 44.97 PmRA 260.72
PmDE -243.21 E RArad 0.33 E DErad 0.3 E Plx 0.43
E pmRA 0.36 E pmDE 0.31 Hpmag 4.6029 E Hpmag 0.0004
SHp 0.005 VA 0 BV 0.512 E BV 0.007
VI 0.58
 
 
21441+2845 B
 
 
Coord arcsec 2000 214408.46+284434.6 Coord calc 214408.46+284434.6 Mag 6.18 Spectral class G2V (yellow)
PmRA 260.00 PmDE -243.0 Tycho2 2201-02078-2 Calc delta mag 1.43
Tycho2
Tycho2 2201-02078-2 Pflag P RAmdeg 326.03572417 DEmdeg 28.74264837
PmRA 277.4 PmDE -251.1 E RAmdeg 3 E DEmdeg 3
E pmRA 2.7 E pmDE 2.6 EpRAm 1991.91 EpDEm 1992.01
Num 3 Q RAmdeg 1.0 Q DEmdeg 0.3 Q pmRA 1.0
Q pmDE 0.3 BTmag 6.785 E BTmag 0.014 VTmag 6.179
E VTmag 0.009 Prox 20 TYC T HIP 107310
CCDM B RAdeg 326.03454639 DEdeg 28.74346778 EpRA 1990 1.92
EpDE 1990 2.00 E RAdeg 3.3 E DEdeg 3.7 Posflg D
Corr 0.3
 
 
21441+2845 C
 
 
Coord arcsec 2000 214403.83+284501.8 Mag 12.93 Calc delta mag 8.18 Calc coord yes
 
 
21441+2845 D
 
 
Coord arcsec 2000 214419.17+284653.7 Coord calc 214419.17+284653.7 Mag 6.94 Spectral class A5 (white)
PmRA -1.00 PmDE -54.0 SAO 89944 HIP 107326
Tycho2 2201-00786-1 HD 206874 GC 30442 BD BD+28 4171
Calc delta mag 2.19
Tycho2
Tycho2 2201-00786-1 Pflag RAmdeg 326.07993096 DEmdeg 28.78160134
PmRA -1.1 PmDE -54.5 E RAmdeg 4 E DEmdeg 4
E pmRA 1.1 E pmDE 1.0 EpRAm 1991.64 EpDEm 1991.67
Num 12 Q RAmdeg 0.8 Q DEmdeg 0.8 Q pmRA 0.6
Q pmDE 0.8 BTmag 7.329 E BTmag 0.015 VTmag 6.940
E VTmag 0.010 Prox 999 TYC T HIP 107326
CCDM RAdeg 326.07993361 DEdeg 28.78172278 EpRA 1990 1.93
EpDE 1990 1.98 E RAdeg 3.5 E DEdeg 4.0 Posflg
Corr 0.2
SAO
SAO 89944 DelFlag RA1950 PmRA1950 -0.0006
DE1950 PmDE1950 -0.048 Vmag 6.9 SpType A5
Double code Source 70 CatNum 30442 DM BD+28 4171
DMcomp BDsup HD 206874 M HD 0
GC 30442 RA1950rad 5.68147705 DE1950rad 0.49832916 PmRA2000 -0.0005
PmDE2000 -0.052
Hipparcos
Catalog H HIP 107326 Proxy RAhms 21 44 19.18
DEdms +28 46 54.2 Vmag 6.89 VarFlag R Vmag H
RAdeg 326.08 DEdeg 28.7817 AstroRef Plx 12.99
CCDM 21442+2845 N CCDM I Nsys 2 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 206874 BD BD+28 4171
CD CP Dm number +28 4171 VIred 0.48
SpType A5 R SpType Coord arcsec 2000 214419.18+284654.2
Hipparcos 2
HIP 107326 Sn 5 So 0 Nc 1
RArad 5.6911684504 DErad 0.5023360234 Plx 11.6 PmRA -0.7
PmDE -53.92 E RArad 0.44 E DErad 0.45 E Plx 0.63
E pmRA 0.53 E pmDE 0.54 Hpmag 6.9882 E Hpmag 0.0011
SHp 0.008 VA 0 BV 0.411 E BV 0.015
VI 0.48
 
 
21441+2845 E
 
 
Coord arcsec 2000 214418.05+284658.5 Mag 13.13 Calc delta mag 8.38 Calc coord yes
 
 
21441+2845 F
 
 
Coord arcsec 2000 214415.63+284508.2 Mag 12.64 PmRA 6.00 PmDE 6.0
Calc delta mag 7.89 Calc coord yes
 
 
21441+2845 G
 
 
Coord arcsec 2000 214419.27+284523.7 Mag 13.77 PmRA 4.00 PmDE 2.0
Calc delta mag 9.02 Calc coord yes